[Issue 15586] std.utf.toUTF8() segfaults when fed an invalid dchar

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15586

--- Comment #1 from thomas.bockman at gmail.com ---
Fix for the Phobos bug:
https://github.com/D-Programming-Language/phobos/pull/3943
Fix for the DMD bug: https://github.com/D-Programming-Language/dmd/pull/5229

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